1 under-ripe cantaloupe *de-seeded and cut into chunks 1 tablespoon brown sugar 2 tablespoons apple cider vinegar 1/4 red onion chopped. Place all ingredients in a pan and simmer until fruit is soft and darker in color (about 10 minutes). Allow to cool, spoon into jars, and keep in the fridge for a week. Adapted from a Whole Foods recipe